Models 5E, 5F, 5G & 5H Electric Switch Machines: Single ... - Alstom

TroubleshootingTable 5–1. Symptoms Noticed from the Control Locations (Cont.)Symptom4) Switch flashing out ofcorrespondence, switch machine(s)failed to move (per position request).5) Switch flashing out ofcorrespondence,display on panel flashing.6) All switches flashing out ofcorrespondence, display on panelflashing.7) Switch flashing out ofcorrespondence, RWP or NWP relaydown (per switch position request).Corrective Action1) Check that RW or NW relay is up.2) Check for BX 120 power at entrance rack.If none, possible blown fuse or bad switchrectifier.3) Check for BX120 power at switch machinemotor. If none, possible bad cable, bad fingerin contactor, loose hardware and/orconnections.4) Check for obstruction in rail points.5) Check rail conditions in area.6) Check that crank cut-out switch place isclosed1) Check that RWC or NWC relay is up.2) Check for faulty contact in circuit.3) Check for loose hardware andconnections.1) Check for AC power at switch machinerectifier.2) Check for DC output at switch machinerectifier.3) Check for WPB power at NWP and RWP.4) Check for blown fuse(s).1) Check that switch machine has thrown to arequested position.2) Check for LB12V DC power at RWP orNWP relay coil.3) Check for faulty relay.4) Check for LB12V DC power at entrancerack.5) Check for LB12V DC power at switchmachine contactor finger.6) Check switch machine contactor fingers.7) Check for loose hardware connections.8) Check for obstruction in rail points.P1293, Rev. Jun/07 5–2 Alstom Signaling Inc.